{
  "manageEntity": {
    "action": "Save",
    "entityId": "814307",
    "entityType": "Track",
    "nonce": "0xafb888fe20cc2edff58a1dd0abacf7836c5274831d5081fd71ab7c05446e03d7",
    "signature": "0x16df9bdfb6aef3734d6444ac5554935aac1d1a90697b884a23e0f885d6e2a44f49da80ec1cd88f3b4a27deb7d434928a726ae1dff32c885e125ff17f3d30cc721b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}