{
  "manageEntity": {
    "action": "Save",
    "entityId": "1256747986",
    "entityType": "Track",
    "nonce": "0x83a41cfb081b727adb1302a0964240ab333b04726e88f7e198e68bb6436203b0",
    "signature": "0xebec34f250a6d901b0140167c70f753597688cd9e15a7037debdcbca038d0f9e0747e4f351be2dba45f558972dfb2d1d4aa4d924fff4d0967c19e74d2838817b1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}