{
  "manageEntity": {
    "action": "Save",
    "entityId": "1605361942",
    "entityType": "Track",
    "nonce": "0xd54adc5bdcd232f5f7e246a37cea52ea1da6004c3e7927254af74e01a96cb04f",
    "signature": "0x4a637f766b586d24177238c65da4c9f8933412ec02d5a81fdeb11e79978c41c822b8b49a550ca597abf3971e9cda4c07f82eaa732e185ad6855c2f4be611b4251c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}