{
  "manageEntity": {
    "action": "Save",
    "entityId": "1485929710",
    "entityType": "Track",
    "nonce": "1786684046359509500",
    "signature": "0x5834c8057b5c23ab4084838764eeeed26fb85a1ac56e01f7c2cb117bfb045ed5549faae2ac1c339027280a3affd20d8206308dd5f9053cac18f40151490f8ecc1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}