{
  "manageEntity": {
    "action": "Save",
    "entityId": "340168076",
    "entityType": "Track",
    "nonce": "0xb08f7947f3ef3f005550601f9b6ae191c6566910f8ae88d9ad126ff26d506479",
    "signature": "0xd369aeb51c507027da4faa8444d798b219a285a40933c0803d25d57c6a10bf720addc44e9f92744946db94506df5e518fd7534d8232fa133ebbbddc82f177a801c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}