{
  "manageEntity": {
    "action": "Save",
    "entityId": "433122396",
    "entityType": "Track",
    "nonce": "0xdad47645560c1ea2829e3621491084af6d5715610e62eb054efc87c15eec9f21",
    "signature": "0x2731a999073038e0a011e00ac7ec68f911c8542d2a953f6650a272b745fdf55843623fd7eac036e81be5919999b8c8a6d8dc667d8a1e3851b5f417e8b14c09911b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}