{
  "manageEntity": {
    "action": "Save",
    "entityId": "740249269",
    "entityType": "Track",
    "nonce": "0x0bb063d8f4ff8344494be253d91133b0b48d7aa9dfbe8cb8dcfee78ac9e454d1",
    "signature": "0xbc6183e40a301bd73e21662f9b32f62b23b016f9e3828a98daebb64a473e329937c1b2f53dd3292daf624d71083bac79d561e5c63e476874a8bf31ee9526ee371c",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}