{
  "manageEntity": {
    "action": "Save",
    "entityId": "105916273",
    "entityType": "Track",
    "nonce": "0x53a025754917496e5e3b8d72f2b2cadaf82fdc722cbaeffd9d19314d3a583fcb",
    "signature": "0xe509bc81944c72e194cd1d7b1643d75a32688e236bd197d556effe096accbafc730869c49af3107ccbcdaed72ed3105045582187b3cbc123a87d5926cb4926291b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}