{
  "manageEntity": {
    "action": "Save",
    "entityId": "708604",
    "entityType": "Track",
    "nonce": "0x1e1dd7c07ac7150b7b46a03ed8e50c4dc72fb716bf79f8d800cde3a1e3d83b31",
    "signature": "0x7e12d6c457a605d62b3645fb78ba16e93ebaf7bd3b4ccc024454be56a1753af350814a03248292b1a78436b73e42df1f5be5e2b033fd412cbaaf31a6c71b0a2c1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}