{
  "manageEntity": {
    "action": "Save",
    "entityId": "1891753770",
    "entityType": "Track",
    "nonce": "0xb9aaa1207da1ab11ae33d4c77b06aa308fb3f1e89601881e858afe6ebe7dbc0c",
    "signature": "0x76fc1a0409df29148a23e671ce6caac6b1a91972457a8d5056be83b75391a9ed16c1b78c1a081e350c306d5b6efd652ed743fd2164042538d26130a86762dc361c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}