{
  "manageEntity": {
    "action": "Save",
    "entityId": "1245332202",
    "entityType": "Track",
    "nonce": "0x9f05d315c65fdff096545c761b6d1d1c449cc18032a813242d8ad33a1b9c8f50",
    "signature": "0x0805c340b0fd76e3fe6d4aabfd4dcce5344b172c0d2593f129f13f0b3902c54a15ca810d3c38cc4e609844ed39671f74646e14e81f70b783362a14bb3f1369511c",
    "signer": "0xa372026fB2EE30b6F81CE820DcE21B455686A702",
    "userId": "344222954"
  }
}