{
  "manageEntity": {
    "action": "Save",
    "entityId": "412502",
    "entityType": "Track",
    "nonce": "0xa1797c9398398db22074c627b5b1f4f603d8e7f5ac570d6ea4caa5512c77eefd",
    "signature": "0xdab970aca713328d025948633809cb1f8635efb745470cab95d93bb316d22e3e323fa7c270aafcc50717adc5ab3bd94d6516decf5f2a09548bff5e44ebda9f081c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}