{
  "manageEntity": {
    "action": "Save",
    "entityId": "1969413931",
    "entityType": "Track",
    "nonce": "0xc4855bdc18afd7eb4fe31e7b78c4bcec547254c50045ddfde63ffc5cb32990e9",
    "signature": "0xfaa567c5199751d5cface11d11f14f47b5d75157c13105754cdb1dfe8ff33b760777dc64aba15d59ab6b251c0463cd4965e516bfde46154ba6daa81952c9e77b1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}