{
  "manageEntity": {
    "action": "Save",
    "entityId": "702196",
    "entityType": "Track",
    "nonce": "0x6fd12079c79717df0e16693edc147c24ba6e2fb56ea3b81d9327e4b36027581c",
    "signature": "0xc7da4f53f4517238dcdb48171f31f2aa533bb533df5b3df8a441b7d80995515d6ae59f6210efa8c81063810a7c8305873e445072fdcf47d12e11ca114384a1e71b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}