{
  "manageEntity": {
    "action": "Save",
    "entityId": "1949261498",
    "entityType": "Track",
    "nonce": "0xbaffb9434ec9821f82c2baf95f006ee3aaaae3c597dd3f3833a804e4b90060b2",
    "signature": "0x92c3e3d91bf5bf1df72ae6237f3556a0f1172e355ab4563ba1713ff335725c486a5173efd1b4cadc5dc7588fd8dd48e13c46c3ed42e79c864ad228d5b2c8bb7c1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}