{
  "manageEntity": {
    "action": "Save",
    "entityId": "1637133165",
    "entityType": "Track",
    "nonce": "0x3aaad32f393f3eb7b442e94394e5d0bee53e8f04b166df61b27cb22661f893cb",
    "signature": "0x385f6ba1d600cf4b57ab6e87fa6a11d5c43ca81d3352109c1e60f5f1678498570c2a87b8c7660d1e65adaeac816bb68996bc48f9e41c1359b00b50c95f50b4b51b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}