{
  "manageEntity": {
    "action": "Save",
    "entityId": "140309",
    "entityType": "Track",
    "nonce": "0xa9d8260863f1976872e3910119350534f11069369c2fe001f86d1e427e85dadf",
    "signature": "0x043a7cf65ee2d2ca0028ff6ae9cf97998ac0e2779b2e7ca1bddb8f73595b6ef5250e1e8ed26afe2f5a6e9b4e934c535df8dee752f3248b0ed6e98ac736dc47a61c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}