{
  "manageEntity": {
    "action": "Save",
    "entityId": "1143064150",
    "entityType": "Track",
    "nonce": "0x0db87df9668d1cbe12cf6db922d4c7ca89db72b6842fa9e211f8d753ab40eb51",
    "signature": "0x2ff48cf1795f0c07a91c90c8859f975a1b124943ed56628fd923ab25cb45e7155d751abdd26ac1cdf87f51a0e7bb151cf67a0b184ce8490338e7d74bb4dc5aa11b",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}