{
  "manageEntity": {
    "action": "Save",
    "entityId": "1727600915",
    "entityType": "Track",
    "nonce": "0x9a489d3932eaf83d412cf3d274813974446249b374b82fa07a32e111f9012cb0",
    "signature": "0x59c626204c2b7004cfe24e28960ac020ae7d63da72f152a397fee67bd964cbe243cf1a609e3eed0f49869a2c7d2d0fa87912be6b47edd9dd5b861f9e58b0495b1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}