{
  "manageEntity": {
    "action": "Save",
    "entityId": "1815543230",
    "entityType": "Track",
    "nonce": "0xa02bb42f68db89af48d56c01152c21120ea34362a9a56be9271b7e533ea3d82b",
    "signature": "0x959cbe13ab7dfbd96e2a762661574359e0de26500289a2ad6e163612ed4e724032034cf8ebbbb4ccf4f02a525fe0863a60745d6cae3ef7d1caabc6ad2970753c1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}