{
  "manageEntity": {
    "action": "Save",
    "entityId": "2013668835",
    "entityType": "Track",
    "nonce": "0x12c2d0145a1d14f56cecc68c6e3fbe86fee9d226007ae8dae5c4edb69b88a142",
    "signature": "0x0d021261f2abafefeb1925881037b24ec29ee01e3658cedca6f589a6ea83f9672fa34dafd6b4ee5f463c22d9a56f50d3fd35f709f900c615c5f8339e64573af31b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}