{
  "manageEntity": {
    "action": "Save",
    "entityId": "360555",
    "entityType": "Track",
    "nonce": "0x3662d16ff1d414b9494e9036b4ab936d1da465e6bf09303c97d7e3c3b50596ec",
    "signature": "0xfadd4bb05379abf60906d0baa9581370e35aed9d9bf283fc80c56e1de4d6ed4400f6bf9712bd81dd91752bc171f5409365d53c5ebd7326cbc711c6e57b596f701b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}