{
  "manageEntity": {
    "action": "Save",
    "entityId": "2008077227",
    "entityType": "Track",
    "nonce": "0x32da428961a03870acef28f637d045929e6d413f219b408a76c1d630c402b7c1",
    "signature": "0x9eb7011825ebde9e0786a935d5fc258d0b8acd745d9df77c20924dc1c88b4084283d54c19f94729570097b792004a4d095b2055f78fbd858f329e1e6b19c41c11c",
    "signer": "0x8FF85C5AA450a88f13FbD5170e24E2a3eFF32518",
    "userId": "311829956"
  }
}