{
  "manageEntity": {
    "action": "Save",
    "entityId": "2081054654",
    "entityType": "Track",
    "nonce": "0x28741cad16b3a6434b6849f24a72ee135ab5aeb7d10d8afa778b3a9a1154d5ec",
    "signature": "0x8d7a53361c310f10d48d6267c8f182f5520c3c1218c112f9834bd68a2e0fcca875ef481761ea02a936a79227a0b186454e6159a66c50113b827d5ddfd43746ea1b",
    "signer": "0x722b43224Dbc7d6931b3C690696EF03933374bff",
    "userId": "772126389"
  }
}