{
  "manageEntity": {
    "action": "Save",
    "entityId": "350384244",
    "entityType": "Track",
    "nonce": "0x26a9d783389138806307c759fb8568a1d91ac3b283ab42993ec12ddf5749b743",
    "signature": "0x4200fb95988cdabde90c727afee9902c9b287024f99bb0e616babbdfb4ce626d2a12f31885e12e12152e67f7eb5344bb86399d245201bc8a3b3ad2b3c9d11b701c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}