{
  "manageEntity": {
    "action": "Save",
    "entityId": "791455610",
    "entityType": "Track",
    "nonce": "0x3b45b1ab96ddaa1234be252fd2779fb1ed95ecbc6aa7795e733146749faad261",
    "signature": "0x6863148dedaf43ad6114e6307970017805c70908d9b2e921976149e4e53993d8756073d33696fdc4be6395ea8b78ddcd305b7c8ddddadfda7f39d29d31fb26901b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}