{
  "manageEntity": {
    "action": "Save",
    "entityId": "147343",
    "entityType": "Track",
    "nonce": "0x5945869abebdec33d0bb102b3c7ced61f3b36c5bb9c201032dd51d26956fb616",
    "signature": "0xff55aeb23f485f0e3e2f91bb56a9007c35cd4d8aab6d2a451248e84704ff94cc18f809faf79e6a80e1fa191adc8e5872d51877f322d377a23eed058bbbf8bfe71b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}