{
  "manageEntity": {
    "action": "Save",
    "entityId": "1545110748",
    "entityType": "Track",
    "nonce": "0xa8d9f3d96465d9f07c7d1c508d7ab321549c355ca7a45147ab11651c0b495190",
    "signature": "0xa86f177be735cf6ffcb715c17dbd4df60df440c812f92bc503cb4fb0d9b6720d2b2df462293d464934c5765985e5d3cdc24a5e67badaeb2682fad6bec854444d1c",
    "signer": "0x354f479338B7F1593E5Ed2Bdb91a09c4bD12996C",
    "userId": "381478870"
  }
}