{
  "manageEntity": {
    "action": "Save",
    "entityId": "1355950060",
    "entityType": "Track",
    "nonce": "0x9dba6dc3e238a13504840f42d5dd6e85fce882abc86993e360bcb3e625da16f9",
    "signature": "0x39ede5bfb6ab7830bff601d81266ea429e99a89877ef51b4ca55df536a2c225d6316b0f528454d0e28f3eba6aa1deecabdee5e7350dc66654a072e827cfd6f111b",
    "signer": "0x2413679eD5Aa7730aDf989AFC81d0a69AEB061AB",
    "userId": "670006010"
  }
}