{
  "manageEntity": {
    "action": "Save",
    "entityId": "1091349030",
    "entityType": "Track",
    "nonce": "0x7f43bfa5112c064d4b85004d06d8a9d2f5304b1f2f979162031516dd7ed56529",
    "signature": "0xaa7d3e449ffa84b31b2441bbbb20f675343cc35e30281a69a4770774b02e551316e0bc9dfb645c94d454144299fe611d7ff6c68896111d648ca5f1d9dbb6d9741c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}