{
  "manageEntity": {
    "action": "Save",
    "entityId": "1576814227",
    "entityType": "Track",
    "nonce": "0x36224f07a9ccd37cb9f1bdd475e97e977701aaadb896401537c1a5a11be39b41",
    "signature": "0xb4dd06659c9352e74e0336280beb950c634a66f24484492d0a6a601ff9e242332e982321ff8bc95114962ea57eec607981bd0540aa276598147896928f3aa4c71c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}