{
  "manageEntity": {
    "action": "Save",
    "entityId": "785026381",
    "entityType": "Track",
    "nonce": "0xe1a90bd050d3d4b531ee05927788f6abc6796ca4fa10625305078d4ac69a246a",
    "signature": "0x9f9e4ee4a37d52ef07b63fa07bec971aad26687ed4f2e8f9b56433a61a9505f043d851723618f7d4d864ad7b1621ed5282f940ed62326839df9fc7b6e84d3f891c",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}