{
  "manageEntity": {
    "action": "Save",
    "entityId": "1908410684",
    "entityType": "Track",
    "nonce": "0x7f88c194843fe8151319b6ddef93a6913d25433ec79c41ddfbe577b6b233d665",
    "signature": "0xb900397d06524b583646c3ecafc6178fdc0c553a6358e5209eb17e2d5fb924aa1d9a86557ca1c39bec6b192d74bca3822598ae2e3bbf94f62c62887a4c30a04a1c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}