{
  "manageEntity": {
    "action": "Save",
    "entityId": "1697573509",
    "entityType": "Track",
    "nonce": "0x75e9d26ea9c1843982f27e2240f93adfa56e2516c16df43cf9c3903bbbc10a6f",
    "signature": "0xc9da3e3909036e0db807e68a569ed32d566d6459c7f08e8f4fef1e4962453f282ea3134f66ccc9e696b44e8780d20be58c0a506925d15fc292d4c13d5ed478981c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}