{
  "manageEntity": {
    "action": "Save",
    "entityId": "1778301837",
    "entityType": "Track",
    "nonce": "0x3e13a12fcfded75a8ab6f2a648819f0773935f7f37cebe1fc7a7173d08cfdc7b",
    "signature": "0xc2e75be52f22be46e3395d270cc2fd81d9780ce9f4c498a749666a7f396545bb0d653beee24b4df5f6afdce04fd6782acf2ddb20b2d374632b9f26de097f9ef01b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}