{
  "manageEntity": {
    "action": "Save",
    "entityId": "3487535",
    "entityType": "Track",
    "nonce": "0x5d395650cce98a1f7b4d9224458831052776e0988bdab030936d397cf9a8c96b",
    "signature": "0x7f862f03c12e2435fe9505dc9e7306cb769c050b3e2cab1432ddbf3c6d8cf5a663daac7a954d88f414926224fa7d11591de1dd7f30828ba0340ce46c134231ce1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}