{
  "manageEntity": {
    "action": "Save",
    "entityId": "889841582",
    "entityType": "Track",
    "nonce": "0x9ec0484ef98e44a8326bc297bed228ea136d7bf845dc1b0e907e88cad9f8f6f3",
    "signature": "0xc6198ab0975e27d700903e5ac7079960dfe29fd2e3c9c906f70ed1ef5edf5c1201fe4c752ed606b6e938beb15594a143b2766c75a7cdbc17f9b02b7b076211bb1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}