{
  "manageEntity": {
    "action": "Save",
    "entityId": "699022243",
    "entityType": "Track",
    "nonce": "0xece85e9f24e5f966fb3294224ba97ae58bb2687b216f012412449f5729a24d73",
    "signature": "0xb6f93ffed0cd52d89c547faf4b88be14998f106db2aeef9a2920f9bbd437dfa73be5fbb74a58c1d32f3a0855d4c615f9cec9a125be23203336cd085c69ecc6d01c",
    "signer": "0xae1C3C4Ae5D334B4e5218C7467455bd9eA142AE5",
    "userId": "720896085"
  }
}