{
  "manageEntity": {
    "action": "Save",
    "entityId": "1599642083",
    "entityType": "Track",
    "nonce": "0x09e1894e99111ccba1b9c823d75934e332e4015641ef00398cd31582a2d76bd6",
    "signature": "0x3774a179582723211688a3dc96f52515703f14c114493f7922653047aae1de467b63f8113e2cc999d1139425f2d57a2feea767c94cd1a9cf93c752e171c881f71c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}