{
  "manageEntity": {
    "action": "Save",
    "entityId": "1783690550",
    "entityType": "Track",
    "nonce": "0x6348410c04177a4a03adf94df532f2b2443662c2e71faba8ae16ac15c3ebdac1",
    "signature": "0x4f673d7d2110b9f47117bf0105368bdda459dcfd1c8e3e4c25844894a826cb1d78380dee81c8d3001c486048d74bd224733bdf257d546babd75f30411655848f1b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}