{
  "manageEntity": {
    "action": "Save",
    "entityId": "504085179",
    "entityType": "Track",
    "nonce": "0xf644c40bd9b7e2d90ea05d73c6985044485907679c4264858333bd6c43957be2",
    "signature": "0xe716d0c28346303735d6fc38d733990c74a3d17888fd18324b5d0484fae1e28675469dd188d63713f047039144beba0c906b1aab5c78cd38045b82a367db350b1c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}