{
  "manageEntity": {
    "action": "Save",
    "entityId": "1684087941",
    "entityType": "Track",
    "nonce": "0x0a13857fc54e49ba8b4300e163f558d870bb0b0263249de302f08c0a1736825b",
    "signature": "0x974a20c9609c40694536a14d3a8f89c0f6ea749380b9b900c3651e0af5da3d3c29450618fd0dd5832fb66244cfe7c147c53231604986bc102aeb79e67999c1121b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}