{
  "manageEntity": {
    "action": "Save",
    "entityId": "169308",
    "entityType": "Track",
    "nonce": "0x277552c3712100e2fd12f30db9da4ff47edf5fb3f41f1197143cbf1646d15f46",
    "signature": "0x761bffe5738c5330272eefe4290d98afbca57e178868896a4f871c87ef17bf76055625fa38c3046f602277e5361f7e208d52abf4a6ba68bda6eb8a9e2c80ba5b1c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}