{
  "manageEntity": {
    "action": "Save",
    "entityId": "598596",
    "entityType": "Track",
    "nonce": "0x37b7fcf071e2f660d7f763ae136872a46d132b7756a8cb49e28aa232c4247c25",
    "signature": "0xf82e69f8261afaea82656b5a76c057c2285ab315aceecbbd7c70d23b5543735e055f8da7f6ee3c8d4813165a767f5f090ab46951714a63c0db618b80df35cdd81b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}