{
  "manageEntity": {
    "action": "Save",
    "entityId": "1031790",
    "entityType": "Track",
    "nonce": "0x2cd5927c6736487c51d97049e13a84f77959042f59e1b29b402c15f24ea7d624",
    "signature": "0xdb85468dcdd681bdd763bcd7453f31acc85e06d87c4336e435bb4cdfa7e8e4114adfed48ce4531442293aa5e5664a43740b956727247be53c0a219fd087d473a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}