{
  "manageEntity": {
    "action": "Save",
    "entityId": "1412319118",
    "entityType": "Track",
    "nonce": "0x45c848a966c299d3d89de4a11b28a4351a33a1ec45773a8e256f27a30ef687f2",
    "signature": "0x810d3d4a916b273c2a80071477ca511ffa9e951dc55286c3aff78dcc20bdd50e515b82a5f86d6789deafd31951a1e30a6ee5298dae199e3790952a9668b238af1b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}