{
  "manageEntity": {
    "action": "Save",
    "entityId": "1048900438",
    "entityType": "Track",
    "nonce": "0xf0d104088c02c76aed68ef7117afdeac89d8f5b064ad9c8f430cbae355994739",
    "signature": "0xcfabe63d8a74af61ccccde8dd9f8109aa92c22dd39deba134fd74529c9a124765107715006b12761d6cdb463c30e254d5ffe1d804eb2b4cd1747b7d81376138e1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}