{
  "manageEntity": {
    "action": "Save",
    "entityId": "686512469",
    "entityType": "Track",
    "nonce": "0xe2473e8234b40ae8b4074825118faef1a1994afc805f6c3295027668588373e0",
    "signature": "0x77932f0367ba6ab8c5a44ed4eb0ab8955b7198ef09c56a4d511c9feb361ebe3e7a1c624cef5b3919fde920f62c6f39ed8a60f758fb22993690c306fe108cf6721b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}