{
  "manageEntity": {
    "action": "Save",
    "entityId": "194238961",
    "entityType": "Track",
    "nonce": "0x25c5efc76fad6a7b5a43a24bbc4c61a23c33939ab0f25e2b9b7f333decad2783",
    "signature": "0x341cd4467eadb52869b0eba0b5a136a41691756cc42ca9a9d9bf3e1c792040d90b7d87bb4a0a1d527354a9c0981a91f158abf8f150349357693912237aa3456d1b",
    "signer": "0xca797dA7dCB793742623d55EA81fb92A9566B550",
    "userId": "363062902"
  }
}