{
  "manageEntity": {
    "action": "Save",
    "entityId": "1300033577",
    "entityType": "Track",
    "nonce": "0x0c57d2652e36b968820b0873d6aab29814446e06e02d5cab30bec65eb892af58",
    "signature": "0x052aeef4ee0cb3607362326a51084c94d71e79a2000a191af57abe0044da627360c92184976df5676a251452108fc3178acda4c070c630c6c643271b0a5969921b",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}