{
  "manageEntity": {
    "action": "Save",
    "entityId": "1275325128",
    "entityType": "Track",
    "nonce": "0x7fb4efb5073f6dfba9482bc35e6da8f3ae1f1fe5a82ca6c6609d213b8cd07e7a",
    "signature": "0xdca704b09fdf4dca381b1f112893239b9382b321757f9e27443748ed40af42245fdd7e476ef323a3ffb46a48160221c1d3cf677562147af0986b2e47a1e96c411c",
    "signer": "0xa185Ff45de6FF68eAa1d7ceC338cba250810134c",
    "userId": "54166466"
  }
}