{
  "manageEntity": {
    "action": "Save",
    "entityId": "330801774",
    "entityType": "Track",
    "nonce": "1792308827798501855",
    "signature": "0x44d2a9b1765198780a3433e609feeab4a9b1c549b7aa8bb0657ab10dc8edfd835afd4ccff60ed48c59c977b12abee816fdda707bc180d456cd6b53a6614dcf591b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}