{
  "manageEntity": {
    "action": "Save",
    "entityId": "221459096",
    "entityType": "Track",
    "nonce": "0x7ad933b673b6f0ac4133ef831bbed9932de4f6ac75bfd878c9d45de066c8860f",
    "signature": "0x1a62bcff83d42afb5992228770f2aa97d8d0e060923dc1119b8e72aa9bce9f002674501e739c355379327ab110df8ca5e75021e5ec8b17bc11b45b5ca51268ad1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}