{
  "manageEntity": {
    "action": "Save",
    "entityId": "1919796130",
    "entityType": "Track",
    "nonce": "0xc371ea1efbc157a3c13dc1a5f5baa5e54976bb5e7960e04bcfced33f12f5a764",
    "signature": "0xd71c57de060461dcccbd596b09f0820835723fec4ac0426f640d645ac8fb764b3df9dd17eda356fc1b4deb1e6c2b70560330da120c8fa9abcc221e283833df831c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}