{
  "manageEntity": {
    "action": "Save",
    "entityId": "227858",
    "entityType": "Track",
    "nonce": "0x76ad8b3123d02fc10490f2defd08a6b6f306bd14a753d871ae655187d637c0a7",
    "signature": "0x281ab48a1f0d1ebde822a85728b4c681910851e10f1629fab1ba2ab699e5839d676559125e09c4fa84bf51169053f62937b7c474a15e316f7a65693ade7bf2d01b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}