{
  "manageEntity": {
    "action": "Save",
    "entityId": "672151313",
    "entityType": "Track",
    "nonce": "0x2874231dd6f5b25df9b018a0afacf8260581bb84de1877c88614bf2eef6829d2",
    "signature": "0x493f221c932740e307c58d1c2e557c5a65fc7e2716e3b7881a665aa48c6c91fc64812513f49f1c4f7f56f659f5d786d4b343c4d2102bc712dc8298fcf69339381b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}