{
  "manageEntity": {
    "action": "Save",
    "entityId": "1085843",
    "entityType": "Track",
    "nonce": "0x8daf50c312b0a39947dd5253a0020f7c835959dbc97884342c0d71a9ee78d0ab",
    "signature": "0x4f4b9e78ce66b367df5d57aa3c76a132bbddaa3f9199bd3077654da014eeb4ca4b879217e4bc0e30ba523220d2d7864e046faeb1d477edc2ee2d264fc5296ee41c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}