{
  "manageEntity": {
    "action": "Save",
    "entityId": "672821952",
    "entityType": "Track",
    "nonce": "0x80c6ba5cdf67d9e24b240908829b0cc2dd991a288a7445532bac4e54961a4251",
    "signature": "0xa44623472e61d1221fd62d31fa1f835239151372e86dcc872e8dd77b4caca85c3f434bef5bf7e2fd5e0589faca08d7cf95efad32f2064a7847baad0da8dd11981b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}