{
  "manageEntity": {
    "action": "Save",
    "entityId": "239415094",
    "entityType": "Track",
    "nonce": "0x8bbaf2fd2b81e1f7d611efd6a7c10ca13ce4245cf32bc8a965efb32296b5e2e9",
    "signature": "0x5dfc78c1128ad0df579b101b8e76803419dd2c422ae9d41be716d1b1c4cdba2160b5ae2eb8e3721495558852f4a8b17c06c06f485db722290649afc98f3166441c",
    "signer": "0xE0EaB915C3153F4a2DF5C6e7b8D58dAc829Fbf2f",
    "userId": "774741623"
  }
}