{
  "manageEntity": {
    "action": "Save",
    "entityId": "335799158",
    "entityType": "Track",
    "nonce": "0x0a9348739aeab4b1d5f864f9062db46359d5c4a5cc9e594f8ba01f2a782c06d1",
    "signature": "0x99c3f6d719535e083f3fc1a61925ae5cc0d46f2130dd82b59b740a7ed8f98b21159c3e1e7871854022744f64fec0db593f81d6647e2a6ee0e3957ed7c2ca5e0e1c",
    "signer": "0x63EbE5a1B5C5F156330BDf810f5fFf6A224c75c8",
    "userId": "309080"
  }
}