{
  "manageEntity": {
    "action": "Save",
    "entityId": "1053697817",
    "entityType": "Track",
    "nonce": "0x2032ab23cf368de10835b0502e5a80e9b69e51e21e8a7987d7b2f13407fc2f0b",
    "signature": "0x67af334e69222e377d6c6262fe4333cdd64f899231e3d5d5a993f5a6ede778801de4fa54d6c6ff412ebfb5222923b0190cc8689c5099c65436ff2a140bfc7f491c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}