{
  "manageEntity": {
    "action": "Save",
    "entityId": "1873645110",
    "entityType": "Track",
    "nonce": "0x47933ddef17a244b700cdb9f257808c78e50394a57978fcef4062cec7d95f11b",
    "signature": "0x104b4a6097d3bd13fc5d61058f0fbdd751675178c7aa2e24c3e2ef9d07bab5493e9631a567ba276960ef7820b04c2b2f9cdec1eec431937f68eff9d7eabcc6401b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}