{
  "manageEntity": {
    "action": "Save",
    "entityId": "586696814",
    "entityType": "Track",
    "nonce": "0xd96acec1db344bbc3dc8817ae40d526c8f07f4ddbaa0a5993b95100c8f5851cd",
    "signature": "0xb4b46d81f88dbaa397a59f323369e662bf8c316c2c366d2b9829168bed2d2c444762e4b556214e26747b5f53eada0cbfdcbb5f01f034a6dfe7cb48284e9b14991b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}