{
  "manageEntity": {
    "action": "Save",
    "entityId": "956049924",
    "entityType": "Track",
    "nonce": "0xc42c6c3db4b0b4456b0c83855258f462d4afd88d92496813e5bbfe34c2ceadb9",
    "signature": "0xec2d779dbe031a53e23504f5cab6f16715b5de371f52dca5609682ecb73a155159e09dd77bc453249053b92e2c6c9198803228c4329952a0a3914e17255529501c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}