{
  "manageEntity": {
    "action": "Save",
    "entityId": "705974",
    "entityType": "Track",
    "nonce": "0xa953aec41f7f320d307c3cd4115c91ff903399d4176637df5c51a883665902d2",
    "signature": "0x1e43f4791beeb685d0b53f896d9e62f0df0cc51cd58b64a8cf3194b6ff18db443ed223106035195571f62d0f0c9a9b667d074835bfe580eb4052b53020f5a79c1b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}