{
  "manageEntity": {
    "action": "Save",
    "entityId": "1831660257",
    "entityType": "Track",
    "nonce": "0x89ff2c5a05dce804d848663e342d34eaf3a9b3c642bf9a9d76d1057f41fa3ea6",
    "signature": "0xbbb87cb6fa2f4bba3e48e9f120a69ac6bbe0b69532d0dc2251ebed292925426d1a304b23a9c59abfc60f9f7779614769de790cf184d849c395b6f7e6ec9feaa81c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}