{
  "manageEntity": {
    "action": "Save",
    "entityId": "112456644",
    "entityType": "Track",
    "nonce": "0x10dc36eb9479f23789be406d9e6b2ae7b26d62fb00939d183d2edc05252a1381",
    "signature": "0x7f23a9c3a5c98944bb5afd16f575a351d06e7cea381f36c64c09b3bbeda6e2ef0fffb3d6f8a1e7ad7bb949021093e5a56539104ef1de3969aa56d0e0588de9751b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}