{
  "manageEntity": {
    "action": "Save",
    "entityId": "147287",
    "entityType": "Track",
    "nonce": "0x8d5c339f195baefa6bfd766ed875f97a15d60a60a06c0db5cc580c8dbfc1e893",
    "signature": "0xd7c8227e3327203610816f9fdace15c691b2f2c557aba0bc22196be8c1262ce9613debc5c5e4c496173f1986e652aef4dd91c9bfd5554cbca7c03e9b6e4b73c61c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}