{
  "manageEntity": {
    "action": "Save",
    "entityId": "1975074013",
    "entityType": "Track",
    "nonce": "0x6b1d599afb108241bc825a003a830c103d2d6c5910fd34e8adee6560af6d393f",
    "signature": "0xc9fed99e05eddbd32370757463b579b4a34125226d07ab3ccdb3e8639459cd874ed2da5fdf8ddf31937e13ce947a7cef7917edd48fb96500aba599bac710a8481b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}