{
  "manageEntity": {
    "action": "Save",
    "entityId": "1004746961",
    "entityType": "Track",
    "nonce": "0x3854ff59d2d1fbd3e05485017e4549bf6851deb2564b119dac0c0993f5b19b3e",
    "signature": "0x3c5144e9c8418ec9d965fbee6a823272ed738552c0c234189dc7b40cf8e8389c1c46e93f649170d36191eeccea20efbae99dc81ecc6cd3d50c0f62bfe73029ee1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}