{
  "manageEntity": {
    "action": "Save",
    "entityId": "226520",
    "entityType": "Track",
    "nonce": "0x7a56f1bee38f595f3d5157c46310f6e2fb36a1c98094b9f33e1383a62f3d0a83",
    "signature": "0x54dfd6f11e359185bbbe18367a0807f17ac3b0e43902d3b9e9c3b1896e8bd51b27b25737144d92279a20bb325f94df0588645811f2ba796a15d1240a3025df571c",
    "signer": "0x14FF2Ce3bf23AEeC9C140996251F6f85D8e99431",
    "userId": "53273933"
  }
}