{
  "manageEntity": {
    "action": "Save",
    "entityId": "1986022945",
    "entityType": "Track",
    "nonce": "0x4ea2268e37b53d3b5e46c9abf8caa870c00e8ec11cf755da4106d0cfb9ec28b1",
    "signature": "0xb788c9c528a5dd8e9693453024bf6db28e5b7c1019ce066a2e5ea8230b874feb07344fb217ce31904a7ab0792601cfdca56f129116c65e133405b76ad331c8491b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}