{
  "manageEntity": {
    "action": "Save",
    "entityId": "1940274947",
    "entityType": "Track",
    "nonce": "0xec33627bd514e404d31b3d4defabaa5157b9450e35026f7d4d405f2d42b29305",
    "signature": "0xfaf023a379e9ca43327438690dbe972cadac1cec88bb56ba8a91b44f6816b5992b40f64041070340c3424524da2af0682c6cdcbb5f91429038a0db6a64c9cb1a1b",
    "signer": "0xF7F56DF4D8a2Ae2BF9Ca645DC684f84c37BbDaFe",
    "userId": "116272245"
  }
}