{
  "manageEntity": {
    "action": "Save",
    "entityId": "1569090951",
    "entityType": "Track",
    "nonce": "0x57968a8b4010967fd5dfbc3287cd274c50b5c96f531fc13bc3ca8475e9a97ce0",
    "signature": "0xfb1e3ff2e6eace2c3e6df5a5ef1d37c2958a392d31718e9703317d819401e55f758c89dbb0b5d15ea11c02ddc4a2f5f5c8bf44ffdceb5d00a8622f0f4964682f1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}