{
  "manageEntity": {
    "action": "Save",
    "entityId": "139062827",
    "entityType": "Track",
    "nonce": "0x9b46123ec347e6a21e09814cafcf9894757f6b958d3f855ddb41828d806a7f1f",
    "signature": "0xaee37a1596d8d3ec8073f07077eebed54bd6c6513d4b8b4c4acaa3bc30bfb9722434d326dd06cd964bbf53e2a1ee102b67261b2ebcf0e11b53bae12d339b89481c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}