{
  "manageEntity": {
    "action": "Save",
    "entityId": "1021367",
    "entityType": "Track",
    "nonce": "0xf2208bab12b0f3f953a41f70eed7a655a1ee260b3689501e9af36a1f76b3c100",
    "signature": "0xb83f690266eb2221c9e27dbfdec7a47596e7c6085e933d5c32f3a9f809f02eef2b8efb0545273c35a07feb48208e1b3f58d67de334b4a232c08eea4d494f661e1c",
    "signer": "0x2D566E1DaC6fc148a694abe846B32e39B6584aa5",
    "userId": "890889753"
  }
}