{
  "manageEntity": {
    "action": "Save",
    "entityId": "811437240",
    "entityType": "Track",
    "nonce": "0xa7fc4bc2b276dbdbedeb10d8ff2bf7ef7239b000aaa0b8d5b6fd386e7b5be163",
    "signature": "0x922775976285062ac994393978f5022be642ff6299ea6fe91695a693442d56a54a4994bc651b8f60669a7edcc164badba72f3777f02133cddc9ed263f8146dba1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}