{
  "manageEntity": {
    "action": "Save",
    "entityId": "1440286738",
    "entityType": "Track",
    "nonce": "0xf476ff68c35cbb09d0610ef3c2cd04a8a51b32df76d7eff69baf6cec3dd601cd",
    "signature": "0xf041fd1060448ffc2c267436893c859bae51962aa741afe3ada50223be3bbd4f35f06a7803799e66fbb2fae77455755870106779e6b475e5d4a373e50ec7e2d21c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}