{
  "manageEntity": {
    "action": "Save",
    "entityId": "1478769857",
    "entityType": "Track",
    "nonce": "0x42f037d62f747d1cde1882166b0cf8ab28f2999a37aeb40f9f3186a965b17149",
    "signature": "0x06dbd3914d508ae8d4da194bced197bc17f29b4a8b6b20f6c59bacc5841d5bf7466c5912cddffedb0d3752d1f36fd053eec19540ac3de365e0bfcb1d07132f811c",
    "signer": "0x9765cbE8e26a2c6c4847C1B69ABeB0B5250EC254",
    "userId": "678556080"
  }
}