{
  "manageEntity": {
    "action": "Save",
    "entityId": "1255886927",
    "entityType": "Track",
    "nonce": "0xe0282538df487ad2285588eac32ad16cbce8a98925d08a2ae7439c9c5f85f170",
    "signature": "0xfb8384b3166d19313692c9e0c4f031384374bf91f33b57bfd51fa2702d7bee2e10b14bd90eff785a6a200a5c557883c2e3c63b4f81aee960674c7751862628301b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}