{
  "manageEntity": {
    "action": "Save",
    "entityId": "544566",
    "entityType": "Track",
    "nonce": "0xbc6c76072a677b014faf5602157b604c785f449608198a3855949d6764ea976b",
    "signature": "0x0fab9e97e6a8241a9b137be29920d6ceb596bf7a84c405c215c711c5117cc0267dbb3db64ee957426c89bf826313f7512c3f6bc8ef6ec8727a19341f4ad166ef1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}