{
  "manageEntity": {
    "action": "Save",
    "entityId": "486982918",
    "entityType": "Track",
    "nonce": "0xba3a8fb525cad76172a5f0ee2770ba4ffba4b1860face98f92cdb210c20bad7d",
    "signature": "0xef1e7d2ed5a1ccf064af7c440df660ccdaebd45a538ae2717ad6774b4c8dcc44569080545219843180d745239c9891415934e3087c74c1918608416731d9d85b1b",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}