{
  "manageEntity": {
    "action": "Save",
    "entityId": "870004803",
    "entityType": "Track",
    "nonce": "0x74f2d2b135562e13f0076d72486361ade7514555bae185dfba0dc5d0e27fd89a",
    "signature": "0xd17f824e2610a47ad126e11af8047227a06e7b98637e064f1761eb171716cccd33f07fccab3832d18f92ac05bf7bbee8abba63ad338ab9622e02641351e60e351b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}