{
  "manageEntity": {
    "action": "Save",
    "entityId": "1548209243",
    "entityType": "Track",
    "nonce": "0x09cf5051a55788f4d1faa756428f8f87f6acc18b5d0d82eec559137a28fd37c0",
    "signature": "0x7f9535b0679d19e0f5c2a1655e4edc84fb59058e87e4408db132d735c2df36e465343df7299e8303ce0701f4d6c05933e6fbb69fa9510b21f7d56e82a2062a9b1c",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}