{
  "manageEntity": {
    "action": "Save",
    "entityId": "1098359",
    "entityType": "Track",
    "nonce": "0x0639f30f9fe0886ee122721c30ce9970bce99f411b6cb51e35e07a637931ab02",
    "signature": "0x0046509d82c94ed7387ba56b30000a142c82de4bf5919ce8412feeebcc4491311592093f584413b6d508f35c8bbcc5916ab5eca8a8874154b15347494bb9d0211c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}