{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777221955",
    "entityType": "Track",
    "nonce": "0xd9eb235085c77e0a5019cc4ae7e8c89d4f65c17ea82b4279bd64b9749bbad961",
    "signature": "0x1ca01ff6e9c17b7299e4b9e805c8cd125569c80fe2353112a4a0e7a3c74bea880fab5e2666d5c5abd90510df56928eab1a95bda0f2773b4f6f7c2cc910f676aa1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}