{
  "manageEntity": {
    "action": "Save",
    "entityId": "1875410284",
    "entityType": "Track",
    "nonce": "0x18801040b6f17452dca9ae2e0e4d32650b3d2647602d5d4a3d87f60f0d37a38c",
    "signature": "0x0110dc721ceae023f5204353cb8e3354f3be8a4f0ace3c9fbd35a54db3aaa1054929ed6ea60ebd76d7a9aedfd9a404b3bfc72b4736238b169a3ea28d101a94801c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}