{
  "manageEntity": {
    "action": "Save",
    "entityId": "244990687",
    "entityType": "Track",
    "nonce": "0xc0c528da81917ae4f15d98bf5012a28574c08e755cdcb07c6f69ef5e4a9840c1",
    "signature": "0x38c2a20dfd6d02f554a07c74aebc24943ac7906938472a5e8dac59aa4edbbaf97482433193faae8724e0bca25dd1a36d085a1b73059106dc8ac5a8a95fdf45e81c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}