{
  "manageEntity": {
    "action": "Save",
    "entityId": "2106589452",
    "entityType": "Track",
    "nonce": "0x6146d341b73a250ae6e3b7ab5f06162c6b6331dc37b9695f41ec2e5499a0df64",
    "signature": "0xe67ed2df490ffec3064634bc435b0fb578532d3758721b53fa3396db52220888583ce146ca1819f472230d0a683bf6453823320b4e6971f988e3f3c89b6b1a501c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}