{
  "manageEntity": {
    "action": "Save",
    "entityId": "530173760",
    "entityType": "Track",
    "nonce": "0x4cf04b14bffe05cbc054d723176055498ce3dee6f3da1f0d463462496fb742e1",
    "signature": "0xbf5af13fed4f122af61a263d8ae5d3b6a88aa06a10e5fc5dedd0fb09e582406e04981bbc7dc8e553e0164b047599fcb875c1afd5fca5a6e3f024c4d2237c7fdd1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}