{
  "manageEntity": {
    "action": "Save",
    "entityId": "554780741",
    "entityType": "Track",
    "nonce": "0xd0e000227fbda6f322837a9422ee79087497505a751dddfd70b578413cfa2df3",
    "signature": "0x0e2e423b7a63b846e7172e00c0cd2e1a7ff682871a87d286c00227f85b81f6de6feab9e02598ccdda80cbf4b99544a372f9be5bba2645d1ca5fa2aebc68abbca1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}