{
  "manageEntity": {
    "action": "Save",
    "entityId": "2004955952",
    "entityType": "Track",
    "nonce": "0x4631313b136822a4539406908dba34b57d41dfe124c65cb2f6305cdfb4c83765",
    "signature": "0x05cf0c60324e27377b0f42551c559c2d2f94219d08f69209d0bd90d849633b1b3a2926a8dcbecaafc20e1bc632432e57d71c5738d59875dbc5a6d3a1bacbcf691c",
    "signer": "0xB755CddA6da08Cbad290b9528CD0dC860f9f7dd5",
    "userId": "536791428"
  }
}