{
  "manageEntity": {
    "action": "Save",
    "entityId": "1164565087",
    "entityType": "Track",
    "nonce": "1785481102086393311",
    "signature": "0xd9b422a46029748a439e6a5921ef7d2ee72f16a3b60fe67a3c10df0213546c492c8b8ba8d1e4989287487460b4cf932183147bc8722bcbe6fd5fcc6ffef5faa11b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}