{
  "manageEntity": {
    "action": "Save",
    "entityId": "208466175",
    "entityType": "Track",
    "nonce": "0xb5b8a2ff022b93b83a0c286a53960bc00fdb993c60ea7cf3eb675308b4fa5090",
    "signature": "0xd3dfa0e875d6e468f7340ca7712c64e33162e30b5d7700e31f0e2c5bb349326740ad53f74e93c8fc89dd521ac46d5e5c0d6713db7145e3dc37f93603ac7c01491c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}