{
  "manageEntity": {
    "action": "Save",
    "entityId": "592090",
    "entityType": "Track",
    "nonce": "0x51241fd582dd91f52b7033114a5f36ebe165d852cc686316eba740891d858fb1",
    "signature": "0xa7d54a4c8c53a46f471cb2fc8f4f703b5c32bb4bc4c0ba5597382687141be39e19a4f7f1d286c93a554ad31e8677d616eb8e0f79f86bd92a03b6418b14b486741c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}