{
  "manageEntity": {
    "action": "Save",
    "entityId": "1150830828",
    "entityType": "Track",
    "nonce": "0x0f91358ad60fd1058848f31fff61e1e2c685c7db898d1f5b4d7adf8e4eae7b67",
    "signature": "0x05ef288944477af4f31372782a69b58e4eedf41311af7cb4ea0bf090dd54365031d41332eee4af5cbf59592402620a689efd9c4e2050cb17d45f033a0c20c70d1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}