{
  "manageEntity": {
    "action": "Save",
    "entityId": "936635388",
    "entityType": "Track",
    "nonce": "0x60f80c941f6a5c4f33e286ab1ff011c862906621f77c004cf899d631c6a0109a",
    "signature": "0x6fd486b28d581dd8aaf754b8fa4a0c821990e86e7c73343e2d1feca58e2b63e229e43f67b86da42bbe672255d4f0f9faed8693ceba428b07af619380e98fb9dd1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}