{
  "manageEntity": {
    "action": "Save",
    "entityId": "230233",
    "entityType": "Track",
    "nonce": "0xfb5deea6c3c588591530a6b73a88e1cdbf898f2aee6dcec3569e4fdf80c59f7e",
    "signature": "0x73ff1dc205c3acffa28d21c0a5f09b387796792c8c5fb79819cd664ba43e17163327b64429e97840c2443f41ce3982fd32cb90d7ec56ecdefea3290615e72df31c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}