{
  "manageEntity": {
    "action": "Save",
    "entityId": "1143064150",
    "entityType": "Track",
    "nonce": "1786846689930780250",
    "signature": "0xa7d24bfd424b9467648b23fceaf0b73f0685e370c32d2f56e918b13aa7ede3cc280aaaf17bc7e4dea77f4f2314766c1f816e99eeb8f78eb43d2bfdce5bbb3bcf1c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}