{
  "manageEntity": {
    "action": "Save",
    "entityId": "1213162915",
    "entityType": "Track",
    "nonce": "0x08e76b432b5fae5b9016ce9432f3f6848c3477edd9df6f4cded7f1ba8bbaf97a",
    "signature": "0x42982ee7b5c7d0d3e6de7b9b03df4dc8c4d91407630ff7dbc42d5b20efb1ed6374dcffd4de0f35ae74d47e341bdc643aa911a3bcc6ffa7b606e05a096158233a1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}