{
  "manageEntity": {
    "action": "Save",
    "entityId": "292100231",
    "entityType": "Track",
    "nonce": "0xff1c59b45c5d6e4715474f87388a7b79be29f79487260d67a66ad4e15d085ff4",
    "signature": "0x33efb541698933567c4828588f3665cb1235bbc5f97fd4d394e53064d2a83cc543a92a63237429531685f60d7e9d1083ba7a84a04bd687f20d8016997b3537d61b",
    "signer": "0x9668338741f0B2F3bcc87715a755f7FFACcEd1D6",
    "userId": "945181225"
  }
}