{
  "manageEntity": {
    "action": "Save",
    "entityId": "2145740277",
    "entityType": "Track",
    "nonce": "0x724536e911c93adb52b9cae2131185299b62cc03219458b795ba5aee068800af",
    "signature": "0x0aa465b873c0971783df5ab6854fd1321817b863e3f171bfe8bcfe3a2ca217936ef2df7e32d0cd981a246f5c4103a1762c2df54790770d0f4fde86e2be26730d1b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}