{
  "manageEntity": {
    "action": "Save",
    "entityId": "670120",
    "entityType": "Track",
    "nonce": "0x5b4530dbd6c8efb027622db734d86c598bbf9bc2205454153b54a43489b2756b",
    "signature": "0xd1bf7184dc7646bc54fb07bab937eb394dcf9345cbf109096c0a2c644074ce2b003b22ddcffa4e7dd996d8914d7f646186b3ee7cff4f0c0234b3ccbe266f24f71b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}