{
  "manageEntity": {
    "action": "Save",
    "entityId": "222651873",
    "entityType": "Track",
    "nonce": "0xbd78b702d6a3e415e4d5d8d0a636677587cad2af41349ef654633e4e5bd423cf",
    "signature": "0xd7b03c10dece441008cd8fdceccafe7f4e1043de23e1ff921d0695b83e7e2923362e7abe0d66630d175e80aab6f198c928b6f4d5fe70045e17ec17073dbb40011c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}