{
  "manageEntity": {
    "action": "Save",
    "entityId": "291860299",
    "entityType": "Track",
    "nonce": "0xf8e07018656a9ec015befdc79f28c2f7e3263937bd7d277460e0ba709f44355f",
    "signature": "0x330088adaba36fb570c6e22e8be7b33fcafd08bff682c1cbdd0c5d47c298c8ed02916b2fe433f0863bcd05d091e44a601cff3b723e655d766c1a54ab2b41f46c1b",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}