{
  "manageEntity": {
    "action": "Save",
    "entityId": "125769",
    "entityType": "Track",
    "nonce": "0x088f2a324f3441d9637d93671cb4aa1785d174cab51f1179dce3845ed619979e",
    "signature": "0x141968b83482a3f1cd5bf30bdb5cb21a210831480df92b8e2a2ec90e1a70385c315d1880c93d9e8af92404f9f9b2df3501c0114274bf35b9ea4525adb879117c1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}