{
  "manageEntity": {
    "action": "Save",
    "entityId": "1650912997",
    "entityType": "Track",
    "nonce": "0x6638297433e63c9171845c38c4f24b28a4c5af602a5cd5d3ea5f5318cf62c6e5",
    "signature": "0x333f3671d4539723727812cc7a3783b9854b21aa96df47c2d7224eb76cc28d1c0df40154d059d1805570bbf157cc2a5dc002c09b2623421f797140062414a7481c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}