{
  "manageEntity": {
    "action": "Save",
    "entityId": "46121201",
    "entityType": "Track",
    "nonce": "0xa50ddc10cd0023a12bd2578b928f005bec9b1b66a59c0d628bd96d14c49363bb",
    "signature": "0xf77f7d41fd811ae605ddec1d97e7d3d75a33222316340a153d1b819ed4d6d447302cee1d5977340ff4f7f32fdd432c785edcbabf7d0dcf222f571fb57a31839b1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}