{
  "manageEntity": {
    "action": "Save",
    "entityId": "2072707719",
    "entityType": "Track",
    "nonce": "0xfff8d6110d95e70bbd9799c513c447a676368b639097e1825e7fbcd5cc389c07",
    "signature": "0x41183fa66856507ba89e557777af63948b9275a784f15176d9773f289a16d5535eea8c31463be8622b2cd191897c55d89d07a4baf448e5778bce5e06ee477ace1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}