{
  "manageEntity": {
    "action": "Save",
    "entityId": "349487237",
    "entityType": "Track",
    "nonce": "0x306fdf209e045af3511697d5374bdca9be351fd22d96f91426f176d0c14f78e7",
    "signature": "0x9366af144a1f4115cd9dd7463bba0710da303d5ba2a80ef86767424916261245027a31f92025e4d1d517c163bb971611133221806ce3472a5e3ef2aed9d24a3a1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}