{
  "manageEntity": {
    "action": "Save",
    "entityId": "790348303",
    "entityType": "Track",
    "nonce": "0xbcb3a2c6240406a6c78ab4a8587e16866a031878d094467f7ac480baa19b4aeb",
    "signature": "0x2df2bb64c682038ded794af5a02b92b03509a0608188a79ab7315208750c6e6e56f4ac9e91065bb4dbb4f890fc7a0148ae201fd14da58aad76c98ee74df1be291b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}