{
  "manageEntity": {
    "action": "Save",
    "entityId": "914860503",
    "entityType": "Track",
    "nonce": "0xc25210613109109f2ad6755898f83386a3397c797d289844ce10b2895b8f1379",
    "signature": "0xf8c440d5a42fb653308f012f77534b5bd0abaec75781e9d3a1617044201968ff21f1f326def72a5845fc738f4b4113d13baade9c167c040a3adb2dc8ff89d0181b",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}