{
  "manageEntity": {
    "action": "Save",
    "entityId": "432729",
    "entityType": "Track",
    "nonce": "0x5de7998390db55d202c5c1fa22da982e0042822561161b7ef13a20f64ff0a903",
    "signature": "0x37c15b65b3e2b23fe0cad54e92e3529b3eab9dbf8257f754521b2aa1921163573de01021de91495062dc5f225bf517e006978220483aa41eded86d10afb532b81c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}