{
  "manageEntity": {
    "action": "Save",
    "entityId": "352424833",
    "entityType": "Track",
    "nonce": "0x0fb35091cdb9e64768e0e8192ce85eb7695a7a89e7fb4f6bc2e1a0d4376889fd",
    "signature": "0x08b47228386530c8723c14ed12926cc1186010caa919951d9a99b124476123735ddd3f82ad4f696449865e6320b759ff6e0bd0c7a31d16f2be1604bf31fb778d1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}