{
  "manageEntity": {
    "action": "Save",
    "entityId": "788905948",
    "entityType": "Track",
    "nonce": "0xf07e2bd172313d3295950dff512b2259179fca80cf0557a10f03cf0ed6a7dd32",
    "signature": "0x0888b57cb8eef997603017ca8fcb738a08e228f1eb163024000eb9c7818263ff24cb73343a448d198321aaf65f91d1f058ce4b4039a2241c0c6f59ce5134cb931c",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}