{
  "manageEntity": {
    "action": "Save",
    "entityId": "210715",
    "entityType": "Track",
    "nonce": "0xa4c4fa64fd8bc262996a1828add8d0403086a6c7f45b5a2fbd54e4bfe60a8312",
    "signature": "0xcea58284c92ccfd2539a1aaa183d969157ab2e94bdf91dfe0da06171fc70b0ff18ea04928faff8025e986c49dc6c0e383fe179fb060792f6d564626f59a2735f1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}