{
  "manageEntity": {
    "action": "Save",
    "entityId": "979060446",
    "entityType": "Track",
    "nonce": "0x97ae48278e0994a46bfaec043d0f13733f043c41e54f55623592e5172a15ca29",
    "signature": "0x93dc62001451fd764e4696770d1d75b5f9b63813eb8ca8e80fb56d7ab6d5d2f52e72f0457d07df57df2928bac4928d53cda2bac7160c03687400f0e8d8c3fc191c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}