{
  "manageEntity": {
    "action": "Save",
    "entityId": "1079403700",
    "entityType": "Track",
    "nonce": "0x6d605a54c59be0eb37f811f0d2ab9fb907dd3bae366868ab4d11e4193218ef0d",
    "signature": "0xd06ee7ce7472ae5b8e202c60cda07451f2c5bdd74bee1c14961dcb00cc774bd47bad059cdf36ffacf404d463b504d88adec4e32ca0f3367c74c98fd8dd3af4611b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}