{
  "manageEntity": {
    "action": "Save",
    "entityId": "1650916747",
    "entityType": "Track",
    "nonce": "0x633319d16ca5b713434421a42ff1c218a722ce24834b232e4adbda91a0ed4eda",
    "signature": "0x64e2c62a033a6f2a013dbe9a3377fb8f146d8889b6150e2d316db25a2e7005c111d42d612b3e424a228efaba13c7c8146d930df089c77ed6092468b14ee08d8e1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}