{
  "manageEntity": {
    "action": "Save",
    "entityId": "858315513",
    "entityType": "Track",
    "nonce": "0x8bb1589772634323eb89cb8441d6c0fe369f67b5b8544f25988e218da724a76f",
    "signature": "0x076ee5b7d93e11a212adf8de2cf1c44740d23ab074d573ed060e0b0d2d9a2553568d646c2f6ec795a194d037ef617280c6bb4ad19b98ee83c9dc29ee5408bfa01c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}