{
  "manageEntity": {
    "action": "Save",
    "entityId": "70183301",
    "entityType": "Track",
    "nonce": "1786316647035822622",
    "signature": "0xae76c679502377fd334c45e19df2243aac5d0e80fa7e1108a3919c9b151e67dd600b6a91457432d3d78f0300875b3cb7c8700761af023e0fa6eb5148846f32cf1c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}