{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216271250",
    "entityType": "Track",
    "nonce": "0x68beb108bebc554464334e156e766c1ef85ee61114aaa7b000d4fad0f48279a6",
    "signature": "0x6ced36d29748966448f1ce2af6ee18151f2e2ddd2f2e57a9abb12f29b6fee71d6ab643d8787f5bcf4b38f6dd45d1d97ab1466a7dbba33228e4a23592109c11b91c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}