{
  "manageEntity": {
    "action": "Save",
    "entityId": "1255886927",
    "entityType": "Track",
    "nonce": "0x9b2cfb9400538c2ee39a8a73a292911b7dff552eb3057f14197082e0d87da02e",
    "signature": "0xa2521a29da4e08436bf731c92b829fe6bc818c8e99a36e52f71cd9a71a266066298ed9e1888d0a1b25bfb1a380330684ea4dc32191fe69f527b93954d51d4f0c1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}