{
  "manageEntity": {
    "action": "Save",
    "entityId": "1210033479",
    "entityType": "Track",
    "nonce": "0xa284e5dad0f998151a00aa0439dbd30b7d318ea4e666a4d4296f614e04e73760",
    "signature": "0xf6fddd3057b27bc1552b8b9ad1da3030e3ca2f1c6c53148c6271739c8eacb103520e59011296f260fee4f62a0affe6c63eff236259f730aa0cfd2151eb1635d01b",
    "signer": "0x87D061690DA9303B273AD54F96fAf50058d2b73F",
    "userId": "318437"
  }
}