{
  "manageEntity": {
    "action": "Save",
    "entityId": "990427865",
    "entityType": "Track",
    "nonce": "0x03f1d0bc5a7c73fb0cafaa47f6f423311a3f7858afded18c87f757b8a446b654",
    "signature": "0x038a6048b72d25bd93da724997d8c8e16312cd5c6452f21b392db7dccceefe56696873c4e6fc798af43c4fa3818e53575818759b32dcf3bba008431a9896ae3c1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}