{
  "manageEntity": {
    "action": "Save",
    "entityId": "920905298",
    "entityType": "Track",
    "nonce": "0x9e55f45b2cd5c72dca7cda4bfb85a7fa1b837c1cf4ee8463496770e70f534102",
    "signature": "0x0dd8ad294ac17d741044674caad864f4feee5353489c657235fda696f20704de3f50febd247f825f6955b7d20c27f7615768d2f7e98aa693fa12a5164ad222821b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}