{
  "manageEntity": {
    "action": "Save",
    "entityId": "625230787",
    "entityType": "Track",
    "nonce": "0x578760c8d68e8ca8cc3c92f181b5cd8734acea65181cf519d0dbf1208bac2d7c",
    "signature": "0xab66ba811e141b904e1dc63c3c5eb89e0fb66fd974590f0c6c8d7549e4f93653340ac8ef1cda2182cfca28e723373c6114f4c24dd9c39b69a00bb72e2d8660ca1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}