{
  "manageEntity": {
    "action": "Save",
    "entityId": "1803099385",
    "entityType": "Track",
    "nonce": "0xb36108162bd3a570bf91a77f1cb87eb072d9491a50fded8104375aab70e9aeec",
    "signature": "0xd659e90786b165cbece4304b8b277224efe743be6543458edc71ee923fcce98a4948604a898fd1d38b0dff9097ec00e2b0d97faac8109e1c0a7c151d6b2ada401b",
    "signer": "0x96F25BA81df0482778A947af84C03800CF5f5d64",
    "userId": "993166642"
  }
}