{
  "manageEntity": {
    "action": "Save",
    "entityId": "1437275362",
    "entityType": "Track",
    "nonce": "0x54d59cc30754be0a149b47dc04cb4c8a656442c8dd78177febeb68f6edad6f31",
    "signature": "0x705604bc7a5c9ef3bc49e8bb2e014cea912f3c8243e38c22d0002af5403a04ac172b0ec1cb2ea8b0e23c07012bfd196d536fc4f1b926a582bf7df9f16d61dbd71b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}