{
  "manageEntity": {
    "action": "Save",
    "entityId": "406109",
    "entityType": "Track",
    "nonce": "0x2b0c1533791db647bbdbafd0909956517a9436105b842899e748a864e92ecc5e",
    "signature": "0x14126501df1c4fbe60e3c398193b3fd5c1e871fc96e960b4983f9ae026f0b9d66e640d7db64aaf84a945414e25b11372d2f73a9727b02901aff8e4516d1c76461b",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}