{
  "manageEntity": {
    "action": "Save",
    "entityId": "1605946302",
    "entityType": "Track",
    "nonce": "0xde7181f5074dedfc474f6272fc4443e98ff72cbe88547bcb547f71e092eb3415",
    "signature": "0x912d882d544ff0c6622a0529968132d688f2f1a32871a406272056f3ab7f0e7759ee7265647269c298aa40a64be9574a25f929b29c82cd70ac1f3aae7024d5621c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}