{
  "manageEntity": {
    "action": "Save",
    "entityId": "1921899035",
    "entityType": "Track",
    "nonce": "0x0ec5a6e452cc9e38ef79ec069b3b5ff564fc35dfb709fb41d0c7b8d357dcba77",
    "signature": "0x281ce8f826282c72c5568efe6710d948e31c919a863d99c2c2cd54bf1b5c279146547b19c86d865ed52569dda66032b4eff18f94ed5b1f6e820a3d7afa5ad22e1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}