{
  "manageEntity": {
    "action": "Save",
    "entityId": "655748043",
    "entityType": "Track",
    "nonce": "0xebe21f341af966210e22acc9db65e0fa4690661c09368d4bbee40280828d358d",
    "signature": "0x6a3bcbdb1a2227b624dc5bf5d8de36020a591277cdead74cf03d019f3c2c03c90e82c96996a59cbf3649e0a981a9db482b689425f37d92572089bceba517e27c1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}