{
  "manageEntity": {
    "action": "Save",
    "entityId": "275566654",
    "entityType": "Track",
    "nonce": "0x97e2035dbf09d012b4185491ff5994f08fa64bf574a5d5d21864c4b03d948ffd",
    "signature": "0x5b17c88606cf1771a29014cd0c6e70b693cc151ea089aff0341cd3db646e4eca63eeec13255dfd99604ef96cc541f6dc647693d66be29f74dd75dfe7a0bec7031c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}