{
  "manageEntity": {
    "action": "Save",
    "entityId": "1910698743",
    "entityType": "Track",
    "nonce": "0x1d2e2f0f5ab3b4eb86154516a3d3d2128c36ced4d69046c78ed0eada1d4ec146",
    "signature": "0xd629a38239136c19226267a83a6fe3361de8d1a6b573fc7dc55b8dd071ca26ec3f6cd01303535a6b8a6debd748acf8e068a9891b6a5d391645ad35beaa80bf721b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}