{
  "manageEntity": {
    "action": "Save",
    "entityId": "2099524413",
    "entityType": "Track",
    "nonce": "0x7d4a968719fbab8224baac53f5e84296cde6d245eb730a2c694273d24fc4c764",
    "signature": "0xcbdb3a4886399edc0fc8236928ba6e94c825ef2abf99028957a1db4a178c5880458e4ff8dc1f2ba2aa8c2efe47ee6f2204d2e7156157779de68faa6288cab8b61c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}