{
  "manageEntity": {
    "action": "Save",
    "entityId": "985581",
    "entityType": "Track",
    "nonce": "0xb3f68a06281e409bdfd33d8dd9d5fde71c07b83328871f3505c3beb21bd31775",
    "signature": "0x980eabe6f53e302b7d24f26531e80f0700bdc1c8781ea0def819383ef7ef0f2477d43943d54595fcbbbaa8be2dd102022c148ca3b02771470af4e9a320e50bbd1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}