{
  "manageEntity": {
    "action": "Save",
    "entityId": "1436743933",
    "entityType": "Track",
    "nonce": "0x41017d7af2c48f76871d1917cca34bb89e1e8f0424febab1897b7d04f217c203",
    "signature": "0xaad22481f51c85fe90e7cb7f67b3c42972fbb148426231ec57ae25f668b7d21f5b882d2011bfc020f5f1be98d7af71c5eb191ddb6a1d66dff05d7522feabfe691c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}