{
  "manageEntity": {
    "action": "Save",
    "entityId": "479278535",
    "entityType": "Track",
    "nonce": "0x812682124cc2a3d15b93fc89a4b8bcc06a3237db16e1d6584b5cd219aabb7d95",
    "signature": "0x55850f15a4e6cada4811ed41d372ad51e11c231c564767885d8e63bb5984a83c0e75e519bfc4c1ff0121c2ee44e985676efaf62961fbcc0e531ad987b6a7ca621c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}