{
  "manageEntity": {
    "action": "Save",
    "entityId": "907187",
    "entityType": "Track",
    "nonce": "0x3d9d8c3b46cd2b8c4fac8ac3bb7acb181567b21a241d01fe5fc39aca18165d23",
    "signature": "0xbad1b7b9d53736e29069e1db87217405ca18cfb804c87eb687bb2480b938444f08ef6552e83178d4b6533e3e5c5e1c6f3a3eabdf1189b4dea00f3c6fa2a6ae301b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}