{
  "manageEntity": {
    "action": "Save",
    "entityId": "1416745438",
    "entityType": "Track",
    "nonce": "0x191b450d4772573b5f92e427e2ada826e094c2cb401fe97f9ae672bddf6df909",
    "signature": "0xf3b96ac2bde4aa84a0e4aa2c6dd15ed49761d854ec1b3690313f52414afa5acf5e202a3726a00689b2feeb18980ed950abfb0a0f3605c15f1ce8626e9f4d31051c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}