{
  "manageEntity": {
    "action": "Save",
    "entityId": "53783",
    "entityType": "Track",
    "nonce": "0x957d3c45447003eb5ab5d9cbbaa9ee219964938a62316828808009a176848bf0",
    "signature": "0x8ad396c07b4a4f36f62f659767b8d79a2b87684a780509c0d8b3c18313ed2c8f3a89b15022ea702db3223a78f8adfef6ad9f5b815f8b713cdf0d8e3be03e6c2d1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}